left hand propellerleft handed screwleft-hand airscrewleft-handed propeller左: the left side; the left旋: whirl螺旋桨: screw propeller; propeller; ...左旋螺杆左旋螺钉左旋螺旋桨: left-handed screw左旋螺旋线: left-handed twist下载手机词典可随时随地查词查翻译